Microsoft rolled out update KB5083769 for Windows 11 to enhance security, but users have reported issues such as BitLocker lockouts, boot loops, and problems with Remote Desktop functionality. The update is causing compatibility problems with third-party backup applications, including Acronis Cyber Protect Cloud, Macrium Reflect, NinjaOne Backup, and UrBackup Server, due to a bug in the Volume Shadow Copy Service (VSS). Users experiencing backup failures are advised to uninstall update KB5083769 as a temporary solution until Microsoft releases a patch. The timeline for resolving these issues is currently unclear.